/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright (C) 2001-2003 Free Software Foundation, Inc.
 *
 * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 * $Id: malloc.c,v 1.4 2003/11/26 15:55:35 dwmw2 Exp $
 *
 */

#include <linux/kernel.h>
#include "nodelist.h"
#include "stdlib.h"
#if !defined(JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE)
# define JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE 0
#endif

struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize)
{
    return malloc(sizeof(struct jffs2_full_dirent) + namesize);
}

void jffs2_free_full_dirent(struct jffs2_full_dirent *x)
{
    free(x);
}

struct jffs2_full_dnode *jffs2_alloc_full_dnode(void)
{
    return malloc(sizeof(struct jffs2_full_dnode));
}

void jffs2_free_full_dnode(struct jffs2_full_dnode *x)
{
    free(x);
}

struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void)
{
    return malloc(sizeof(struct jffs2_raw_dirent));
}

void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x)
{
    free(x);
}

struct jffs2_raw_inode *jffs2_alloc_raw_inode(void)
{
    return malloc(sizeof(struct jffs2_raw_inode));
}

void jffs2_free_raw_inode(struct jffs2_raw_inode *x)
{
    free(x);
}

struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void)
{
    return malloc(sizeof(struct jffs2_tmp_dnode_info));
}

void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
{
    free(x);
}

struct jffs2_node_frag *jffs2_alloc_node_frag(void)
{
    return malloc(sizeof(struct jffs2_node_frag));
}

void jffs2_free_node_frag(struct jffs2_node_frag *x)
{
    free(x);
}

#if JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE == 0

int jffs2_create_slab_caches(void)
{
    return 0;
}

void jffs2_destroy_slab_caches(void)
{
}

struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)
{
    return malloc(sizeof(struct jffs2_raw_node_ref));
}

void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
{
    free(x);
}

#else // JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE == 0

static struct jffs2_raw_node_ref
    rnr_pool[JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE] __attribute__ ((aligned (4))),
    * first = NULL;
static jffs2_drv_mutex_t mutex;

int jffs2_create_slab_caches(void)
{
    struct jffs2_raw_node_ref * p;
    jffs2_drv_mutex_init(&mutex);
    for (
        p = rnr_pool;
        p < rnr_pool + JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE - 1;
        p++
    )
    p->next_phys = p + 1;
    rnr_pool[JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE - 1].next_phys = NULL;
    first = &rnr_pool[0];
    return 0;
}

void jffs2_destroy_slab_caches(void)
{
}

struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)
{
    struct jffs2_raw_node_ref * p;

    jffs2_drv_mutex_lock(&mutex);
    p = first;
    if (p != NULL)
        first = p->next_phys;
    jffs2_drv_mutex_unlock(&mutex);
    return p;
}

void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
{
    jffs2_drv_mutex_lock(&mutex);
    x->next_phys = first;
    first = x;
    jffs2_drv_mutex_unlock(&mutex);
}

#endif // JFFS2NUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE == 0

struct jffs2_inode_cache *jffs2_alloc_inode_cache(void)
{
    struct jffs2_inode_cache *ret = malloc(sizeof(struct jffs2_inode_cache));
    D1(printk(KERN_DEBUG "Allocated inocache at %p\n", ret));
    return ret;
}

void jffs2_free_inode_cache(struct jffs2_inode_cache *x)
{
    D1(printk(KERN_DEBUG "Freeing inocache at %p\n", x));
    free(x);
}

